(p;v):+(.'2_'" "\)'0:"i/14.in"
b:101 103                           / bounds
s:(b!')'v+                          / step
*/#'=2/'0<(~*/')_(-2!b)-/:100 s/p   / part 1: shift so 0 0 is centre, binary decode on 0< to get quadrant
#1_(~|/{20<+/1=-':x@<x}'.=!/+:)s\p  / part 2: find tree

Christmas tree? What's that? Is it like at least 20 guards being next to each other?

(or perhaps inputs are created by generating it first...)

~/aoc24k/14.html